Lawn-mower.



NO. 792,419. PATENTED JUNE 13, 1905.

A. JACKSON.

LAWN MOWER.

APPLIGAIION FILED DEC. 29. 1904.

l4 INI/ENY'OR Miran STATES Patented June 13, 1905.

ANDREW JACKSON, OF WINNETKA, ILLINOIS.

LAWN-MOWER.

SPECIFICATION forming part of Letters Patent No. 792,419, dated June 13,1905.

Application filed December 29, 1904. Serial No, 238,743.

To (LZZ whom, it may concern:

Be it known that I, ANDREW J AeKsoN, a citizen of the United States,residing at I/Vinnetka, in the county of Cook and State of Illinois,have invented new and useful Improvements in Lawn-Mowers, of which thefollowing is a specification.

This invention is an improvement in lawnmowers, and is characterizedparticularly by a novel drive mechanism whereby the rotating knives aredriven from the ground-wheel and also by an improvement in theconstruction of the frame which allows the knives to extend acrosspractically the whole width of the mower whereby it may successfully beused for trimming grass close to an object such a fence or a building.

ln the accompanying drawings, Figure 1 is a side elevation of themachine with parts broken away and in section. Fig. 2 is a plan viewthereof, partly in section.

Referring specifically to the drawings, 6 indicates the side frames ofthe machine. Toward the rear these are offset inwardly, as at 7, andhave rearwardly-extending arms 8, in which the main axle 9 is journaled.This axle is carried by the ground-wheels 10 and 11, of which the latteris the driver. These wheels fit in behind the offsets 7, so that theextreme width of the machine is no greater than the distance between theouter faces of the side frames. Also, the ground-wheels run behind thecutter, so that the uncut grass'is not bent down or lodged by thedrivewheels, and there is less liability of the driving gear beingclogged thereby. The machine also runs easier, particularly when cuttinglong grass.

piece or fastened together, the pinion being on the inner end of thestub-shaft toward the driving-wheel. The pinion meshes with the internalgear-wheel 18, which is loose on the axle 9 and is located within therim of the drive-wheel 11. The wheel 18 has spur ratchetteeth 19, whichare engaged by a spring-pawl 20, carried within the rim of thedrive-wheel 11. On forward movement the pawl engages the ratchet anddrives the gearing, but slips on the backward movement.

The knives are indicated at 21, extending between spiders 22, which havespindles which find bearings in the side plates 6. The knives shearacross a fixed cutter-bar 23, extending thereunder across between theside frames, and behind the cutter-bar is a ground-roller 24 to supportthe frontofthe machine. The side frames are properly spaced apart andsupported by a rod 25, as well as by the parts heretofore referred to.The knives are driven by a chain 26, which extends around thesprocket-wheel 16 and around a sprocket 27 on one of the spindles 28,which carry the knives. On the driving side of the machine the .sideframe is dished or curved in at the front, as at 6, forming a guardwhich prevents grass getting into the chain.

Inasmuch as the drive-wheels follow in the swath, they take a bettergrip on the ground than if either of them ran in the uncut grass. Thisgives a better and easier drive. It also permits the machine to run asclose to the side of a building or fence as the side plates will allow,and consequently much closer than if the driving-wheels were carriedoutside the swath.

Having thus described my. invention, what is claimed as new, and desiredto be secured by Letters Patent, is

In a lawn-mower, the combination with a frame offset inwardly at therear end, a rotary cutter therein, and a drive-wheel located outsidesaid rear end and carrying a pawl, of a wheel loose on the axle of thedrive-wheel and having a rim on the outside of which is a ratchet and onthe inside of which is an internal gear, a shield supported on the frameand located outside said wheels and having a stubshaft projectinginwardly, a pinion on the shaft and engaging the gear, and gearingbetween the pinion and the cutter.

In testimony whereofl have signed my name to this specification in thepresence of two suhscrlhing witnesses.

ANDREW J AGKSON.

Witnesses:

CLARA Pnosorm, H. G. BATCHELOR.

